| Grand Prix: | Belgian |
| Flag: | Belgium |
| Official Name: | GP of Belgium[1] [2] [3] |
| Location: | Circuit de Spa-Francorchamps |
| Course Mi: | 4.312 |
| Course Km: | 6.940 |
| Race No: | 7 |
| Season No: | 12 |
| Date: | 6 July |
| Year: | 1986 |
| Pole Rider 500: | Randy Mamola |
| Pole Rider 500 Country: | USA |
| Pole Time 500: | 2:28.280 |
| Fast Rider 500: | Randy Mamola |
| Fast Rider 500 Country: | USA |
| Fast Time 500: | 2:48.990 |
| First Rider 500: | Randy Mamola |
| First Rider 500 Country: | USA |
| Second Rider 500: | Eddie Lawson |
| Second Rider 500 Country: | USA |
| Third Rider 500: | Christian Sarron |
| Third Rider 500 Country: | FRA |
| Pole Rider 250: | Carlos Lavado |
| Pole Rider 250 Country: | VEN |
| Pole Time 250: | 2:34.340 |
| Fast Rider 250: | Dominique Sarron |
| Fast Rider 250 Country: | FRA |
| Fast Time 250: | 2:55.970 |
| First Rider 250: | Sito Pons |
| First Rider 250 Country: | ESP |
| Second Rider 250: | Donnie McLeod |
| Second Rider 250 Country: | GBR |
| Third Rider 250: | Jacques Cornu |
| Third Rider 250 Country: | SUI |
| Pole Rider 125: | Luca Cadalora |
| Pole Rider 125 Country: | ITA |
| Pole Time 125: | 2:44.690 |
| Fast Rider 125: | Domenico Brigaglia |
| Fast Rider 125 Country: | ITA |
| Fast Time 125: | 3:02.050 |
| First Rider 125: | Domenico Brigaglia |
| First Rider 125 Country: | ITA |
| Second Rider 125: | Lucio Pietroniro |
| Second Rider 125 Country: | BRA |
| Third Rider 125: | Willy Pérez |
| Third Rider 125 Country: | ARG |
| Pole Rider 80: | No 80cc race was held |
| Fast Rider 80: | No 80cc race was held |
| First Rider 80: | No 80cc race was held |
| Second Rider 80: | No 80cc race was held |
| Third Rider 80: | No 80cc race was held |
The 1986 Belgian motorcycle Grand Prix was the seventh round of the 1986 Grand Prix motorcycle racing season. It took place on the weekend of 4–6 July 1986 at the Circuit de Spa-Francorchamps.
| Pos. | Rider | Team | Manufacturer | Time/Retired | Points | |||
|---|---|---|---|---|---|---|---|---|
| 1 |  Randy Mamola | Team Lucky Strike Roberts | Yamaha | 57'25.020 | 15 | |||
| 2 | Eddie Lawson | Marlboro Yamaha Team Agostini | Yamaha | +17.430 | 12 | |||
| 3 |  Christian Sarron | Team Gauloises Blondes Yamaha | Yamaha | +1'02.820 | 10 | |||
| 4 |  Wayne Gardner | Rothmans Team HRC | Honda | +1'08.280 | 8 | |||
| 5 |  Rob McElnea | Marlboro Yamaha Team Agostini | Yamaha | +1'13.630 | 6 | |||
| 6 |  Pierfrancesco Chili | HB Suzuki GP Team | Honda | +2'23.670 | 5 | |||
| 7 |  Didier de Radiguès | Rollstar Honda Racing Team | Honda | +2'39.240 | 4 | |||
| 8 | Mile Pajic | Stichting Netherlands Racing Team | Honda | +1 lap | 3 | |||
| 9 | Boet van Dulmen | Honda | +1 lap | 2 | ||||
| 10 | Kevin Schwantz | Suzuki | +1 lap | 1 | ||||
| 11 | Wolfgang Von Muralt | Frankonia-Suzuki | Suzuki | +1 lap | ||||
| 12 | Mark Phillips | Suzuki | +1 lap | |||||
| 13 |  Masuru Mizutani | Walter Wolf Racing | Suzuki | +1 lap | ||||
| 14 |  Peter Sköld | Bakker-Honda | +1 lap | |||||
| 15 | Robert Jung | Honda | +1 lap | |||||
| 16 | Gary Lingham | Suzuki | +1 lap | |||||
| 17 | Paul Ramon | Suzuki | +1 lap | |||||
| 18 | David Griffith | Suzuki | +2 laps | |||||
| Ret | Alessandro Valesi | Honda | Retired | |||||
| Ret |  Andreas Leuthe | Honda | Retired | |||||
| Ret | Mike Baldwin | Team Lucky Strike Roberts | Yamaha | Accident | ||||
| Ret |  Dietmar Marehardt | Honda | Retired | |||||
| Ret | Bernard Denis | Suzuki | Retired | |||||
| Ret | Raymond Roche | Racing Team Katayama | Honda | Accident | ||||
| Ret |  Juan Garriga | Cagiva | Retired | |||||
| Ret | Fabio Biliotti | Team Italia | Honda | Retired | ||||
| Ret | Paul Lewis | Skoal Bandit Heron Suzuki | Suzuki | Accident | ||||
| Ret | Maarten Duyzers | Suzuki | Retired | |||||
| Ret |  Eero Hyvärinen | Honda | Retired | |||||
| Ret | Ron Haslam | Team ROC | Honda | Accident | ||||
| Ret | Marco Gentile | Fior | Fior | Retired | ||||
| Ret | Manfred Fischer | Team Hein Gericke | Honda | Retired | ||||
| Ret | Leandro Beccheroni | Suzuki | Retired | |||||
| Ret | Roger Burnett | Rothmans Honda Britain | Honda | Retired | ||||
| Ret | Karl Truchsess | Honda | Retired | |||||
| Ret | Simon Buckmaster | Honda | Retired | |||||
| Ret | Josef Doppler | HRC Grieskirched | Honda | Retired | ||||
| DNQ | Harry Heutmekers | Suzuki | Did not qualify | |||||
| Sources: [4] [5] | ||||||||